The Packers have nine unrestricted free agents, meaning they can sign with any team. Backup quarterback Malik Willis, linebacker Quay Walker, wide receiver Romeo Doubs and offensive linemen Sean Rhyan and Rasheed Walker are the highest profile names.

Here are NFL writer Frank Schwab's top free agents overall and at each position and what you need to know during this phase of the offseason.

Free agency will play out totally wrong for the San Francisco 49ers if they sign one of these players to a deal.

NFL free agency starts unofficially on Monday, when teams can begin negotiations. USA TODAY Sports’ Tyler Dragon ranks his top free agents available.

In order to make those moves, however, an NFL team has to have an adequate amount of salary cap space. With the rising costs of player contracts and the exorbitant amount of money required to sign a quarterback to a second contract, some teams are in far worse shape to add talent as free agency fast approaches.